Question

Guadalupe can do a job in 15 hours. If she works with lan, together they can get the job done in 10 hours. How long would it take lan to do the job alone?

Answer 1

30 hours

Explanation:

The equation we use is 1/15 + 1/x = 1/10. X being the amount of time it takes Ian alone. X works out to 30 hours which is the answer